EDEN PRAIRIE, Minn. -- A look at the highlights from the first day of the Minnesota Vikings' mandatory minicamp on Tuesday:

1. Loaded for Barr: The Vikings got first-round pick Anthony Barr on the field for the first time with their full team on Tuesday, after he graduated from UCLA over the weekend, and head coach Mike Zimmer didn't hesitate to try out some of the different ways he wants to use the linebacker. Barr was at the strong-side linebacker position the Vikings expect him to play, but he also lined up as an edge rusher on some third downs. At 6-foot-4, he's taller than defensive ends Brian Robison and Everson Griffen, and if he can rush from the line of scrimmage, the Vikings can present a number of different looks to confuse opposing offenses, especially when Griffen's versatility enters the equation.

First-round pick Anthony Barr participated on the field on the first day of Vikings' mandatory minicamp. Bruce Kluckhohn/USA TODAY Sports

2. Robinson returns: Cornerback Josh Robinson was back on the field on Tuesday, after missing the Vikings' organized team activities with a muscle pull. He was also back at an outside cornerback position, following last year's failed experiment at slot cornerback. Robinson got plenty of snaps in the Vikings' first-team defense on Tuesday, and could wind up playing in the nickel package once Captain Munnerlyn moves inside.

3. Quarterbacks look sharp: The Vikings ran plenty of play-action and bootleg plays on Tuesday, and all three of their quarterbacks had a successful afternoon practice. Matt Cassel missed just one of the nine throws he attempted in 11-on-11 and was 5-for-5 in 7-on-7 work. Teddy Bridgewater was 15-for-17 in 11-on-11 action and 4-for-5 in 7-on-7, and Christian Ponder hit all four throws he attempted. Ponder again got fewer snaps than Cassel or Bridgewater, but he looked good in what he was asked to do. "Everyone's getting reps with the ones and twos," Ponder said. "I'm not getting as many reps as the other guys, but I'm trying to take full advantage, and we'll see what happens. I don't know how long the evaluation process is going to be. I'm hoping it goes into training camp and preseason games, but we'll see."

4. Jennings impresses: Wide receiver Greg Jennings, who missed the Vikings' open OTA last week because of a charity event, caught four balls on the first day of minicamp, and saved his best for last, reaching out for a one-handed grab over the middle on a throw from Cassel in 7-on-7.

5. Middle linebacker plan emerges? The Vikings used Jasper Brinkley, Chad Greenway and Michael Mauti at middle linebacker on Tuesday, noticeably keeping Audie Cole on the outside after Cole played the middle at the end of last season. Brinkley has gotten more first-team work than anyone else in the middle, so far, but Zimmer cautioned not to read too much into that. "We have to line them up somewhere when we go, but I don't look at this guy is the favorite or that guy is the starter," he said. "(Brinkley)'s lined up with the first team right now, but I don't know, once we get him in practice and games and the things that prepare us for games and for the season, that will determine who lines up there on Sept. 7."